Removable window sash balancing mechanism



Oct. 1', 1957 J. G. PERRY 2,807,838

REMOVABLE WINDOW SASH BALANCING MECHANISM Filed Dec. 27, 1955 2 Sfieets-Sheet 1 f v 33 I2 33 35 INVENTOR.

JAMES G. PERRY A BY ATTORNEY J. G. PERRY REMOVABLE WINDOW SASH BALANCING. MECHANISM Oct, 1, 1957 2 Sheets-Sheet 2 Filed D90. 27, 1955 INVENTOR. JAMES G. PERRY ATTORNEY United States ,.P th

WINDOW SASI-I BALANCING MECHANISM REMOVABLE This invention relates to window balancing mechanisms for use with double hung, removable sash windows.

In the use of double hung windows it is customary to balancethe sash for movement in the side frames, so that the sash may be raised and lowered with a minimum of effort. Many-means have heretofore been devised for that purpose. With the advent of the modern, weather stripped, removable sash combinations, many new problems have arisen. For example, the problem of what to do with the.balancing mechanism upon the, removal of the sash and particularly during the operations of removing and replacing the sash.

It is therefore-an object of this invention to provide means for securing, and locking the sash balancing mechanism, under tension, during the operations of removing, storing and replacing the removable window sash.

Another object of the invention is to provide a window balancing mechanism, with means to prevent the parts of the balancer from becoming displaced, when under tension, during the removal and storage of the sash.

Another object of the invention is to provide a window balancing mechanism, with means to facilitate the easy r e-engagement of the parts of the balancer, when the window sash is being re-placed.

Another object of the invention is to provide a window balancing mechanism, having readily disengageable elements, which are easily installed and readily concealed from view when in use.

Another object of the invention is to generally improve devices of the character indicated, and to provide a window balancing mechanism, which is simple in construction,

economical to manufacture and easy to assemble.

The foregoing-and other objects and advantages of the invention will become more apparent as the description proceeds, reference being made from time to timeto the accompanying drawing, forming part of the within disclosure, in: which drawing:

- Fig. .1 isna front .elevational view, with parts removed andparts in section, showing a window frame'an'd' sash assembly. embodying the invention.

Fig. 2 is-asection taken substantially" on the line "2 2 of Fig. 1.

Fig. 3 is an enlarged detail of one of the fastening elements employed in practicing the invention.

Fig. 4 is an enlarged fragmentary view, in perspective, with parts in section, showing the upper left hand corner of the window sash illustrated in Fig. 1, with another one of the fastening elements attached thereto.

Fig. 5 is a view illustrating the manner in which the fastening elements shown in Figs. 3 and 4 co-operate. In Fig. 5 the fastening elements are shown removed from the sash.

Fig. 6 is a view similar to Fig. 1, but shows schematically the manner of manipulating the balancing cable and fastening elements, preliminary to the removal of the window sash.

Fig. 7 is another view, similar to Fig. 1, but showing Patented Oct. '1, 1957 me p 2 the parts in adjusted position, preliminary to the removal of the sash.

Fig. 8 is an enlargedfragmentary detail, of one of the weather strip elements having an anchoring slot for receiving the hook portion of the fastening element illustrated in Fig.3.

Fig. 9 is an enlarged detail showing the relative position of the fastening elements, shown in Figs. 3 and 4, before and after being manipulated, as shown in Fig. 6.

Fig. 10 is an enlarged fragmentary detail, in perspective, showing the relation of the fastening elements when being manipulated as in Fig. 6.

Referring now more particularly to the drawing, it will be understood that in the embodiment herein disclosed, the reference character 11 indicates the lower sash of a double hung window, the upper sash having been previously removed. The sash 11 is provided with a pane of glass 12, and is mounted in a conventional window opening, which is provided with the side frames or jambs 13 and 14, trim stops 15 and 16, blind stops 17 and 18, side molding 19, a sill 20 and a'header 21, all of which are conventional.

Mounted to the side jambs 13 and 14 (Fig. 2), are pairs of combined, sash guides and weather strips 22-22A which are fully disclosed in my previous Patent No. 2,720,682, issued October 18, 1955. The pressure plate 23 and spring 24 are also fully disclosed in my previous patent, hereinabove referred to, and are employed for the purpose of enabling an operator to move the sash to the right of the frame, against the spring 24, so that the left side of the sash 11 may be freed from the channel 25 formed in the weather strip, guide 22. It will be understood that each sash of a double hung window is provided with a pair of the sash guide, weather strips 2222A, and that the elements of the pairs are oppositely disposed for the lower sash and the upper sash, as shown in Fig. 2.

The lower window sash 11 is hung and balanced by.

the elements which I will now describe. Secured as at 27 (Fig. l) to the bottom of the window frame, by any suitable means, is an expansion spring 28, to the upper end fastener 32 (Fig. 3), which is adapted to engage a fastener 33 (Fig. 4 which is mounted in a slot '34, formed in' theside member of the lower sash 11, and to which it is secured by means of screws 35 or any otherv suitable means. The fastener 32 (Figs. 3 and 5) has a pair of reduced shoulders 36, which are adapted. to engage the hook elements 37 formed on the fastener 33, so that when the fastening elements 32 and 33 are in'the. mating position illustratedin Fig. 5, the sash 11 will bezresiliently supported by the cable 30, so that the sash 11 may be slidably moved upwardly and downwardly in the weather strip, guide members 22-22A. The upper sash (not shown) is supported by a similar balancing mechanism,

certain parts of which are indicated by the reference character 38 (Fig. 2).

With a resilient balancing mechanism as just described, a problem presents itself, when it is desired to remove the sash 11 from the frame. A similar problem presents itself with the removal of the upper sash. I will describe the operation, with reference to the removal of the lower sash, and it will be understood that a similar operation has previously been performed in the removal of the upper sash.

In order to remove the lower sash 11 from the window frame, it is necessary to dis-engage the fastening element 32 from the fastening element 33, which is permanently securedto the sash 11. It will be understood that when the fastening elements 32 and 33 are in the mating position, asshown in Fig. 5, they will both be recessed in the groove 34 of the sash 11 (Fig; 4) and will travel freely with the sash in the channel 25 of the guide member 22.

When the fastening element 32 is dis-engaged from the fastening element 33, the cable 30, under the'pull of the spring 28, would cause the fastening element 32 to fly to the top of the window frame, unless it is anchored in position, before the sash 11 is finally removed from the frame. In order to anchor the fastening element 32 against such displacement, I provide one or more locking slots 39 (Figs. 8 and 10), in suitable locations along the guide member 22. A hook member 40 is provided on the lower end of the fastener 32 and is adapted to engage the upper edge of the slot 39 as shown in Fig. 10. When the hook 40 engages the upper edge of the slot 39, the fastening member 32 and the cable 30 are then anchored against upward dis-placement.

In order to move the hook 40 into engagement with the slot 39, the fastening element 32 has to be tilted into the position shown in Figs. 9 and 10. This is done by manually pulling the cable 30in the direction of the arrow, as shown in Fig. 6. With this manual operation, the fastening element 32 pivots on the fastening member33, so that the hook 40 may be received in the slot 39. When the hook 40 is so anchored in the slot 39, the sash 11 is then manually moved upwardly, until the hooks 37 of the fastening element 33 are released from the shoulders of the fastening element 32. The sash 11 may then be moved to the right, against the pressure of the spring 24,

and be freed from the channel 25, after which it can be readily removed from the opposite guide 22A, and hence be entirely freed from the window frame.

To reinstall the lower window sash 11, the right side is first inserted into the guide 22A and the sash is pressed tightly against the springs 24, the left side may then be swung into position, so that the sash engages the guide slot 25 inthe member 22, with the fastening element 33 located above the fastening element 32, as shown in Fig. 7. The cable isthen manually moved in the direction of the arrow, as shown in Fig. 6, rockingthe fastening element 32 toward the fastening element 33. The sash 11 is then lowered, so that the hooks 37 of the fastening element 33, engage the shoulders 36 of the fastening element 32, so that upon further downward movement of the sash 11,1the hook of the. fastening element 32, will be dis-engaged from the slot 39 in the guide member 22. The cable 30 is then released from the hand and the parts are again returned to their relative positions, as shown in Fig. 1, so that the sash 11 is free to travel in the guides 22 and 22A, under the influence of the resilient balancing mechanism.

It'is believed that the operation of the device is obvious from the foregoing description.

Having described my invention what I claim and desire to secure by Letters Patent is:

1. In combination with a window construction of the character described, including a frame, a sash and a pair of metallic, channel-like, guide members, one of which is fixed and the other of which is resiliently mounted, for slidably holding said sash, anchor means on said fixed guide member, a sash balancing mechanism, comprising an expansion spring, secured to said frame, a cable secured to the other end of said spring and supported intermediate its ends by means carried at the upper end of said fixed guide member, and disengageable means for securing the other end of said cable alternately to said sash and to the said anchor means on said fixed guide member.

2. The structure of claim 1, in which said spring and part of said cable are housed for longitudinal movement in said fixed guide member.

3. The structure of claim 1, in which said spring and part of said cable are housed for longitudinal movement in said fixed guide member, and said means on said fixed guide member for supporting said cable, comprises a pulley for receiving said cable.

4. The structure of claim 1, in which said disengageable securing means comprise a pair of mating elements, one of which is carried on the sash and the other of which is carried at one end of said cable, the first of which elements has hook projections thereon for receiving the other element, when moved vertically in one direction and for releasing said other element, when moved vertically in the opposite direction.

5. The structure of claim 1, in which said disengageable securing means comprise a pair of mating elements, one of which is secured to the sash and has projections thereon for receiving the other element, which is secured to the cable, when moved vertically in one direction and for releasing said other element, when moved vertically in the opposite direction, said last named mating element having a projection thereon for engaging said anchor means formed in one of said guide members, when moved in one direction vertically, and be released from said anchor means when moved in the opposite direction.

6. The structure of claim 1, in which one of said disengageable means is pivotable with respect to the other, whereby it may be moved into positions to be received by and released from the anchor means formed on one of said guide members.

7. The structure of claim 1, in which one of said disengageable means is pivotable with respect to the other, whereby it may be moved into positions to be received by and released from the anchor means formed on one of said guide members by transverse movements of said cable.

References Cited in the file of this patent UNITED STATES PATENTS 943,014 Greear et a1. Dec. 14, 1909 1,443,571 Gardner Jan. 30, 1923 2,583,395 Skelly Jan. 22, 1952 2,677,156 Holmes May 4, 1954 2,720,682 Perry Oct. 18, 1955 2,772,449 Nicoll Dec. 4, 1956 

